Unofficial Samsung Remote is an app that does exactly what the title suggests. The Windows Phone app enables users to control their Samsung Smart TV sets to take advantage of the television's advanced functionality that may not be available with the standard remote.

As well as changing channels, adjusting volume levels, navigating around the Smart Hub and inputing data into fields using the keyboard, the app boasts a number of features that's going to make any Samsung television owner drool.

It's noted on the app's Store listing that it supports the following Samsung televisions:

LED 6500 series or higher (model code starts with 'U')

LCD 650 series or higher (model code starts with 'L')

PDP 6500 series or higher (model code starts with 'P')

Unfortunately there is a downside to the app (though it's reportedly down to the television itself, and not how the app is coded). The app cannot turn the TV on as its wireless remote server is only running when it's already powered on. Furthermore, this is not a licensed, endorsed or approved Samsung solution, so be sure to use at one's own risk.

The latest version (1.6) upgrades the app to fully support Windows Phone 8 hardware, as well as the implementation to make holding down volume up / down keys to register continuous manipulation of the volume.

Two more interesting things.
1: This app is not new, it has been out for well over a year, I've been using it to control my UE6530 perfectly.
2: As Visual360 says, under WP8, it connects to TV fine but the buttons do nothing. (Lumia 920)(Please update your app to fix this Mr Nice Developer sir)

The RM820 and 821 are the actual model numbers for the Lumia 920. Just like the European HTC Titan was actually called the X310e. OEM's have generic names for their devices before the marketing people get hold of them. As far as I know the 820 is the US version of the Lumia 920 and the 821 is everywhere else.